LONDON: Do aliens exist? Are humans the only sentient species in the universe? Is there extraterrestrial life? Are we alone?
It's one of humanity's most all-consuming questions, fascinating scientists, governments and pop culture alike, foreign media reported. But in 2017 a US space scientist claimed that advanced life forms may be a reality - but that they disappeared long ago. Professor Jason Wright, an astronomy and astrophysics professor at Pennsylvania State University, published a paper in arXiv entitled 'Prior Indigenous Technological Species'. In 2017 he claimed that ancient 'technological species' may have lived on Earth billions of years before the human race.
Well, either Earth, or a "pre-greenhouse Venus," or "a wet Mars”... He wasn't 100 per cent sure.